Whirling Vortex

A great spinning tide forms in a liquid, centered within 50ft of you and spanning a 15ft circle. All creatures not in the middle but still making contact with the vortex must make a Strength saving throw to resist the tide once the spell is cast, if successful than the target is moved 5ft closer to the center, if failed then they are immediately moved into the center and immediately begin to drown, making the constitution checks upon failing, if a target is already in the center than they must both make Athletics (STR) checks, the lower of the two being forced before the water in the center and the higher being above but still drowning. Once 2 minutes pass the vortex dispurses, sending all within it in a random direction for 2d20 feet, if they strike an object then they take 3d8 bludgeoning damage.